[200q20v] Re: Fault Code 2413, HELP and speaker whistle
dak at dotech.com
Sun Sep 16 21:27:49 EDT 2001
Thanks, but this is not RPM related. Pitch change seems to be time
related and that time isn't always constant. Should probably just replace...
Derek Pulvino wrote:
> I was going to say check Scott Mockry's site for more information on
> fault code 2413, but then I actually read your e-mail and realized
> you'd been down that road. Too rich aye? Leak on intake path? Some
> kind of problem with the new chip? Was anything else changed at the
> same time as the ECU programming? I also though maybe O2 sensor but
> by the fact that the computer knows enough to figure out the "adaption
> limit's been exceeded" it implies the O2 sensor is working. How else
> would the engine know if the limit's have been exceeded?
> Best I can do with the info. Never btdt. Chris Miller?
> The sound you described likely changes pitch in direct relation to the
> engine RPM's. IE, higher RPM, higher pitch noise. This noise is
> often associated with the alternator; often caused by a bad ground
> (whether in radio, external connectors, at speakers, etc.) or at
> running signal wires too close to the power supply. Second is
> unlikely since it is a factory system and likely didn't do it new. It
> does still have the factory system? I wouldn't be alarmed and
> consider it indicative of an impending Bose explosion. My cars been
> doing since my purchase (2+years) and stereos still going strong. I
> also notice it more on the tape player than radio.
> One solution I've heard of is installing a capacitor between the hot
> output on the alternator and ground. Like I said though, haven't
> been down that road so don't know what value capacitor to use or
> whether there is another better solution.
> In the least, I think you can safely forget about an impending
> incendiary failure.
> Derek Pulvino
> Get your FREE download of MSN Explorer at
More information about the 200q20v